on the vtr body kit it is built into the bumpers and side pannels. you will need to take the bumpers off. and then the door panels. which means taking the trim under the arches out. bit of a pain tbh mate. just go to a local build merchants and get cheap plastic dust sheets, cover your car and mask tape around the bump strips.
sand them down starting at 240grit wet and dry, and work your way down to 1200grit. get it nice and smooth and just use plastic primer. then halfords gloss black, matt black, satin black paint (which ever you like) and give it a few coats. then lacquor it. there are guides on here.